Hand-operated concrete-block mold



June 18, 1929. E. J. GARVIN ET AL HAND OPERATED CONCRETE BLOCK MOLD Filed May 1'7, 1926 2 Sheets-Sheet 1 Patented June'l8, 1929.

UNITED STATES "PATIENT;OFFICE; 5

EDWARD J. GARVIN, or GLENDALE, Ann JOSEPH 1a aorrnson, or LOS ensures, entr- FORNIA, nssrenons T CONCRETE ENGINEERING AND EQUIPMENTiCOMFANY QOF CLARKSDALE, ARIZONA, aconronarron or ARIZONA. r

-HAND-OPERATED CONCRETE-BLOCK MOLD.

Application filed May 17, 1926. Serial No. 109,503.

This invention relates to a hand operated concrete block mold and is more particularly directed to a mold for forming cored concrete blocks, and which mold has hand actuated means for ejecting the molded blocks from the mold box. j

The principal object of this invention is to provide a hand operated mold for forming concrete blocks which is of simple and inexpensive construction and easy to operate and which is extremely well adapted for the purpose of forming relatively small cored concrete blocks adapted for use in building or construction purposes.

Another object of this invention is to provide a mold for forming hollow concrete blocks, which mold includes a mold box which is adapted to be supported upon spaced supports to be filled with the concrete and which may then be picked from the spaced supports and shook to settle the concrete in the mold box around cores mounted therein, and which mold may, after the same has partially set, be inverted by an ejector mechanism operated by the hands of the laborer to move a false bottom through the mold box to e ect the concrete blocks therefrom.

In this application, the term concrete is used in a broad or generic sense to include all combinations of cement, sand, water, or the like. and to include other dehydrated materials from which building blocks are constructed, such as ypsum and the like.

Other objects and advantages of this inin vention will be apparent from the following detailed description of a preferred embod1-- ment thereof as illustrated in the accompanyinc; drawings, in which drawings:

Figure 1 is an isometric view of a mold embodving this invention, and illustrating the same as supported between spaced molds and in position to receive the concrete for the formation of a block.

Figure 2 is a similar isometric view thereof, illustrating the mold in the inverted position to be actuated to eject the concrete block from the mold box. n I a Figure 3 is a central sectional side elevation thereof.

Figure 4 is an end elevationxthereof.

In the preferred embodiment of this invention illustrated in the accompanyin draw- 7 b the cordblocks from the moldm box2.

ing'al illustrates spaced supper-tin members which may heconetructed of woe steel, or

hire material, and upon which molding box 2 1S supportedduring the filling thereof with Elie cloncrete for the formation of the concrete 0c (S. l

The moldingbox Qpreferably comprises a lower rim frame member 3;and an upper rim frame member 4 which may be of any desirable construction and which provide outwardly extending flanges 26. The flanges 26 of the lower rim frame member 3 support the molding box 2 on the spaced supports 1 during the filling of the molding box 2. The upper and lower rim frame members 3 and l are secured to tapered cores 18 at spaced points throughout the length of the tapered cores 18 and by any suitable means such as illustrated at 27L I 7 Means are provided for ejecting the molded blocks from the molding box 2 after the same have set or partially set, and which moans preferably comprise an ejector frame 8 which might be constructedof spaced bars I I 9 which are secured together in spaced relation bymeans ofa pairofspaced cross-brace castings 10. Screwthreaded to theouterends of the cross-brace castings'lO are corner post guide rods 11 which extend through bores 12 formed in the flanges 26 of the upper and lower rim frame members and l, respectively, so as toprovide guidesfor the ejector frame 8 as the same is moved to eject the molded blocks from the molding b0x2;

Secured to the cross-brace castings 10 are falsebottom supporting posts 13 'whichare at their upper ends secured to spaced false bottom removing castings 15, as indicated at l 16. Secured to the spaced castings 15 is the false bottom 17 which is cut away aroundthe base of the tapered members 18 so as to permit movement of the false bottom 17 over the "said members 18 during theejection of p 45' lower rim frame members 3b means of bolts 20 Which likewise secure the saaced core sna ortin D bars 19 in positioinare spaced brackets 22 to whiche ector frame actuat ng handles 21 are pivotall'y supported at pins 28 whichare formed-integral with the said handles21.

.7 The handles 21 haveinwardly projecting extensions 23 which are provided at their inner ends with engaging feet 2% Whieh areadapted to engage lateral extensions 25 of the spaced fals'ebottom removing castings 15.

In order to eject the molded blocks from the molding box 2 atterthe mold has been in verted, the operator of the devicejgrips the ejector frame actuating handles 21 with his 8 fingers and places his thumbs npon the'erossbrace castings 10'and by exerting pressure upon the handles 21, the molding box 91s caused 'to move upwardly alongthe guiderods 8 so that as the false bottom 17 remains stationary, the molded bloeksare forced from the molding box 2, thereby stripping or e ecting the blocks from the mold;

Having fully described a preferred embodi'ment of our invention, it is to be understood thatwve do not Wish to be limited to the exact details herein set forth which may obviously be varied Without departing from the spirit ofzourinvention as setforth in the appended claiin. a

Vfeclaimz V i p p In a device ofthe class described, the com- 7 bination of amoldingbox an ejector frame, f

to said false bottom, and cross-braces secured to said frame in position to provide pressure blocks to be engaged 'by'the thumbs of the hands. when actuating dies.

day of May, 1926.

Josnrn B. JOHNSON. EDWARD J. GARVIB.

said fulcrumed ban Si 'ned at Los Angeles, California, this? 

